[CLNP-7806]Fix a bug where mentionedMessageTemplate is being set even when the message is not a mentioned message

[danney-chun]

[fix]: Fix a bug where mentionedMessageTemplate is being set even when the message is not a mentioned message

Fixes CLNP-7806

Changelogs

• Fix a bug where mentionedMessageTemplate is being set even when the message is not a mentioned message
• Fix a bug where URL links inside Markdown-type messages do not open in a new tab

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[OnestarLee]

lgtm